Jackknife, "Kaizerion" (RR) Danger World If this card link attacks

If this card link attacks with you

You may only cast "Star Believer" once per turn

■ All size 30 or greater monsters on your field cannot be destroyed

You may only cast "Crystallization Phenomenon" once per turn

and your opponents cannot [Counter] it

Jackknife, "Kaizerion" (RR) Danger World If this card link attacks[Call Cost] [Put this card on top of a monster on your field & Pay 2 Gauge] When this card enters the field during your final phase, if there is a Neodragon or Brave Machine in its soul, choose an item on your field. If you do, for this turn, [Stand] that card, it can attack during the Final Phase and it gets critical+1! [Move][Soulguard]